Low-background liquid scintillation spectrometer capable of realizing sample urgent detection

Abstract

The utility model provides a low background liquid scintillation spectrometer capable of realizing sample urgent detection, which at least comprises a packaging shell and a sample bearing frame arranged in the packaging shell, an additional sample loading mechanism is arranged on the sample bearing frame, and the additional sample loading mechanism is pulled in and out of the packaging shell. And the additional sample loading mechanism is provided with a sample groove for placing an emergency sample injection bottle. A sample can be temporarily added, the added sample loading mechanism is pulled in and out of the packaging shell, the whole sample tray does not need to be opened, and it is avoided that the placed sample is subjected to standing and light shielding again; and the additional sample loading mechanism is provided with sample grooves with different sizes, so that emergency detection of emergency sample injection bottles with different sizes can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of low-background liquid scintillation spectrometers, in particular to a low-background liquid scintillation spectrometer capable of realizing expedited sample detection. Background Art

[0002] Low background liquid scintillation spectrometer is a liquid scintillation counter used for measuring ultra-low level α and β radioactivity. It is mainly used for low level radioactivity in various environmental samples such as water, soil, organisms, aerosols, etc. 3 H. 14 The measurement of radionuclides such as C plays an important role in nuclear waste disposal, environmental protection, archaeological dating, medical analysis, food safety, and scientific research. Low-background liquid scintillation spectrometers use liquid scintillators to receive radiation from the substance being measured and convert it into fluorescent photons. Photoelectric devices then amplify and multiply the light to form pulses. Electronic circuits and software then process the light to produce a series of waveforms, completing the measurement of the substance. Currently, the leading ultra-low-background liquid scintillation spectrometers on the market include PE from the United States, Hidex from Finland, and the SLA series from Shanghai Xinman. These products require reopening the sample tray when adding samples temporarily, forcing the already placed samples to rest in the dark again, making it inconvenient to add samples temporarily. Utility Model Content

[0003] In response to the deficiencies in the prior art, the present invention provides a low-background liquid scintillation spectrometer that can realize expedited sample detection. It can realize temporary additional samples, and the additional sample loading mechanism can be pulled in and out of the packaging shell, without opening the entire sample tray, avoiding the need to re-place the placed samples in the dark; and the additional sample loading mechanism is provided with sample slots of different sizes, which can realize emergency detection of emergency sample bottles of different sizes.

[0004] The technical solutions adopted to achieve the above-mentioned purpose of the utility model are:

[0005] A low-background liquid scintillation spectrometer capable of expedited sample detection comprises at least a packaging shell and a sample carrier installed in the packaging shell. An additional sample loading mechanism is installed on the sample carrier, and the additional sample loading mechanism is pulled in and out of the packaging shell. A sample slot for placing an emergency sample bottle is provided on the additional sample loading mechanism.

[0006] The bottom of the emergency injection bottle is detachably provided with an external standard source, and the bottom of the sample slot on the additional sample loading mechanism is correspondingly provided with a pit, the shape and size of the pit match the shape and size of the external standard source. When the emergency injection bottle with the external standard source fixed is placed in the sample slot on the additional sample loading mechanism, the external standard source is located in the pit at the bottom of the sample slot.

[0007] The external standard source is pasted and fixed on the bottom of the emergency injection bottle.

[0008] The additional sample loading mechanism includes a sample box and a side sealing plate. The sample box is provided with at least one sample slot of different sizes. The sample box is slidably connected to the sample carrier. A sample box inlet and outlet are provided on the shell wall of the packaging shell at the sample box, and the sample box slides in and out of the sample box inlet and outlet; the side sealing plate extends from the sample box inlet and outlet and is fixedly connected to the sample box, and after the sample box enters the packaging shell, the side sealing plate is abutted against the packaging shell to seal the sample box inlet and outlet.

[0009] The size of the sample slot on the sample box matches the size of the emergency injection bottle, and the sample box is provided with sample slots of different sizes.

[0010] The side sealing plate is provided with sealing members around it. When the side sealing plate is in contact with the packaging shell, the sealing members seal the four sides of the inlet and outlet of the sample box.

[0011] The sample carrier is connected to the packaging shell by pulling, and the sample box inlet and outlet are located on the front side of the sample carrier.

[0012] A driving mechanism is installed between the sample box and the sample carrier, and the driving mechanism drives the sample box to automatically slide in and out of the packaging shell.

[0013] The driving mechanism includes a mounting plate, an electric push rod, a linear slide and a slider. The mounting plate is fixed on the sample carrier, the linear slide is fixed on the mounting plate along the direction in which the sample box is pulled in and out, the slider is slidably mounted on the linear slide, the sample box is fixedly connected to the slider, the electric push rod is arranged along the direction in which the sample box is pulled in and out, and the fixed end of the electric push rod is fixed on the mounting plate, the movable end of the electric push rod is fixedly connected to the sample box or the slider, and the electric push rod works to drive the sample box to automatically move in and out of the packaging shell.

[0014] The low-background liquid scintillation spectrometer further comprises a three-dimensional motion sampling mechanism, which moves the emergency injection bottle on the additional sample loading mechanism to the detection mechanism of the low-background liquid scintillation spectrometer for detection.

[0015] Compared with the existing technology, the technical solution provided by the present invention has the following advantages: 1. The low-background liquid scintillation spectrometer provided in the present invention that can realize expedited sample detection can realize temporary additional samples, and the additional sample loading mechanism is pulled in and out of the packaging shell without opening the entire sample tray, avoiding the need to re-place the placed samples in a dark place.

[0016] 2. In the present invention, an external standard source is detachably fixed on the bottom of the emergency injection bottle. The external standard source is loaded, calibrated and taken out together with the emergency injection bottle, which facilitates the calibration of the instrument during the detection process.

[0017] 3. The additional sample loading mechanism of the present invention is provided with sample slots of different sizes, which can realize emergency testing of emergency sample bottles of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an external structural diagram of the low-background liquid scintillation spectrometer provided by the utility model that can realize expedited sample detection;

[0019] Figure 2 This is a diagram of the internal structure of the low-background liquid scintillation spectrometer provided by the utility model that can realize expedited sample detection;

[0020] Figure 3 This is a schematic diagram of the installation of the additional sample loading mechanism on the sample carrier in the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the additional sample loading mechanism in the present invention;

[0022] Figure 5 This is a schematic diagram of the utility model in which the external standard source is fixed to the bottom of the emergency injection bottle and placed in the pit at the bottom of the sample tank;

[0023] Figure 6 This is a schematic diagram of sampling for emergency testing of additional samples in the present invention;

[0024] In the figure: 1- packaging shell, 2- sample carrier, 3- emergency injection bottle, 4- sample box, 5- side sealing plate, 6- driving mechanism, 61- mounting plate, 62- electric push rod, 63- linear slide rail, 64- slide block, 7- three-dimensional motion sampling mechanism, 8- detection mechanism, 9- external standard source. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The structure of the low-background liquid scintillation spectrometer provided by the utility model for realizing expedited sample detection is as follows: Figure 1-Figure 2 As shown, it at least includes a packaging shell 1 and a sample carrier 2 installed in the packaging shell. In this embodiment, an additional sample loading mechanism is installed on the sample carrier, and the additional sample loading mechanism is pulled in and out of the packaging shell. The additional sample loading mechanism is provided with a sample slot for placing an emergency sample bottle 3, as shown in FIG. Figure 3 shown.

[0027] Specifically, the additional sample loading mechanism includes a sample box 4 and a side sealing plate 5, as shown in FIG. Figure 4As shown, the sample box is provided with at least one sample slot of different sizes. Furthermore, the size of the sample slot on the sample box matches the size of the emergency injection bottle. The sample box is provided with one sample slot of different sizes. Since the sizes of common emergency injection bottles are 20mm and 4-7mm, the sample box in this embodiment is provided with one 20mm sample slot and one 4-7mm sample slot. In actual settings, if the emergency injection bottle is of other sizes, a corresponding sample slot of other sizes is provided on the sample box. The sample box is slidably connected to the sample carrier. The shell wall of the packaging shell is provided with a sample box inlet and outlet at the sample box, and the sample box slides in and out of the sample box inlet and outlet; the side sealing plate extends from the sample box inlet and outlet and is fixedly connected to the sample box, and after the sample box enters the packaging shell, the side sealing plate is abutted against the packaging shell to seal the sample box inlet and outlet. Specifically, sealing members (such as silicone strips, etc.) are installed around the side sealing plate. When the side sealing plate is abutted against the packaging shell, the sealing member seals the sample box inlet and outlet on all sides. Furthermore, the sample carrier is retractably connected to the enclosure, with the sample box inlet and outlet located on the front side of the carrier. In actual operation, if only one sample is added at a time, the additional sample is directly placed in the additional sample loading mechanism to protect it from light. If multiple samples are added at once, the additional sample is loaded into the instrument through the additional sample loading mechanism, and then the sample is placed on the sample tray through the sampling mechanism to protect it from light, and then additional samples are added one by one.

[0028] In this embodiment, the bottom of the emergency injection bottle is detachably fixed with an external standard source 9. Specifically, the external standard source is attached to the bottom of the emergency injection bottle. Figure 5 As shown. The bottom of the sample slot on the additional sample loading mechanism is correspondingly provided with a pit, the shape and size of the pit matching the shape and size of the external standard source. When the emergency injection bottle with the external standard source fixed is placed in the sample slot on the additional sample loading mechanism, the external standard source is located in the pit at the bottom of the sample slot. When the instrument needs to be calibrated during the detection process, the external standard source is fixed to the bottom of the clean and empty emergency injection bottle, and then added into the instrument through the additional sample loading mechanism, waiting for loading and injection. The external standard source is loaded into the detection chamber of the detection mechanism together with the emergency injection bottle, realizing the calibration operation during the instrument detection process.

[0029] In this embodiment, a driving mechanism 6 is installed between the sample box and the sample carrier, and the driving mechanism drives the sample box to automatically slide in and out of the packaging shell. Specifically, the driving mechanism includes a mounting plate 61, an electric push rod 62, a linear slide 63 and a slider 64. Figure 4The mounting plate is fixed to the sample carrier, and a linear slide is fixed to the mounting plate along the direction in which the sample box is pulled in and out. A slider is slidably mounted on the linear slide, and the sample box is fixedly connected to the slider. An electric push rod is arranged along the direction in which the sample box is pulled in and out, and the fixed end of the electric push rod is fixed to the mounting plate. The mounting plate is provided with a long hole, and the movable end of the electric push rod extends through the long hole into the upper surface of the mounting plate and is fixedly connected to the sample box or the slider. When the electric push rod is operated, it automatically drives the sample box in and out of the packaging shell. Since the sample box is provided with only two sample slots, a low-cost electric push rod is sufficient. In actual configuration, a stepper motor or servo motor can also be used.

[0030] The sampling mechanism of the low-background liquid scintillation spectrometer in this embodiment is a three-dimensional motion sampling mechanism 7. The three-dimensional motion sampling mechanism can sample at any position. The emergency injection bottle sample on the sample box is placed into the detection mechanism 8 of the low-background liquid scintillation spectrometer for detection through the three-dimensional motion sampling mechanism. When an emergency additional sample is needed, the sample box is automatically slid out of the packaging shell by the additional sample driving mechanism, and the emergency injection bottle of the sample to be tested is placed. Then, the sample box is automatically entered into the packaging shell by the additional sample driving mechanism, and the side sealing plate is sealed around the inlet and outlet of the sample box. The sampling mechanism is controlled to preferentially transfer the emergency injection bottle on the sample box to the detection mechanism, such as Figure 6 As shown, the expedited detection of the sample is completed without affecting the light-shielding treatment effect of the sample to be tested loaded on the sample carrier.

Claims

1. A low-background liquid scintillation spectrometer capable of expedited sample testing, comprising at least a housing and a sample carrier mounted within the housing, characterized in that: An additional sample loading mechanism is installed on the sample carrier, and the additional sample loading mechanism is pulled in and out of the packaging shell. A sample slot for placing an emergency sample bottle is provided on the additional sample loading mechanism.

2. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 1, characterized in that: The bottom of the emergency injection bottle is detachably provided with an external standard source, and the bottom of the sample slot on the additional sample loading mechanism is correspondingly provided with a pit, the shape and size of the pit match the shape and size of the external standard source. When the emergency injection bottle with the external standard source fixed is placed in the sample slot on the additional sample loading mechanism, the external standard source is located in the pit at the bottom of the sample slot.

3. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 2, characterized in that: The external standard source is pasted and fixed on the bottom of the emergency injection bottle.

4. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 1, characterized in that: The additional sample loading mechanism includes a sample box and a side sealing plate. The sample box is provided with at least one sample slot of different sizes. The sample box is slidably connected to the sample carrier. A sample box inlet and outlet are provided on the shell wall of the packaging shell at the sample box, and the sample box slides in and out of the sample box inlet and outlet; the side sealing plate extends from the sample box inlet and outlet and is fixedly connected to the sample box, and after the sample box enters the packaging shell, the side sealing plate is abutted against the packaging shell to seal the sample box inlet and outlet.

5. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 4, characterized in that: The size of the sample slot on the sample box matches the size of the emergency injection bottle, and the sample box is provided with sample slots of different sizes.

6. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 4, characterized in that: The side sealing plate is provided with sealing members around it. When the side sealing plate is in contact with the packaging shell, the sealing members seal the four sides of the inlet and outlet of the sample box.

7. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 4, characterized in that: The sample carrier is connected to the packaging shell by pulling, and the sample box inlet and outlet are located on the front side of the sample carrier.

8. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 1, characterized in that: A driving mechanism is installed between the sample box and the sample carrier, and the driving mechanism drives the sample box to automatically slide in and out of the packaging shell.

9. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 8, characterized in that: The driving mechanism includes a mounting plate, an electric push rod, a linear slide and a slider. The mounting plate is fixed on the sample carrier, the linear slide is fixed on the mounting plate along the direction in which the sample box is pulled in and out, the slider is slidably mounted on the linear slide, the sample box is fixedly connected to the slider, the electric push rod is arranged along the direction in which the sample box is pulled in and out, and the fixed end of the electric push rod is fixed on the mounting plate, the movable end of the electric push rod is fixedly connected to the sample box or the slider, and the electric push rod works to drive the sample box to automatically move in and out of the packaging shell.

10. The low-background liquid scintillation spectrometer capable of realizing expedited sample detection according to claim 1, characterized in that: The low-background liquid scintillation spectrometer further comprises a three-dimensional motion sampling mechanism, which moves the emergency injection bottle on the additional sample loading mechanism to the detection mechanism of the low-background liquid scintillation spectrometer for detection.

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